Which word is associated with the heart?
cerebrum, coronary, or pulmonary

Prompt compare the three types of volcanic mountains in terms of shape, type of eruption, and the minerals that make up the volcano

Use the drop down menus to match each example to the fossil topic discussed then to show how the fossil record gives evidence of evolution

What were the main components of earth’s earliest atmosphere? oxygen and ammonia hydrogen and helium oxygen and nitrogen hydrogen and nitrogen